Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0077c5cc7d53e56…

MALICIOUS

PDF

69.2 KB Created: 2021-09-30 12:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ce6244b736cdbf104bbfe199affc272a SHA-1: c94bfb8a9639800c11f33686524facb1f7b14b16 SHA-256: d0077c5cc7d53e56bbb106e065180542b66ac86bd46a19ea0f98f066dad08b19
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these external sites, which are designed to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://wastran.ru/uplcv?utm_term=ghost+of+tsushima+apk+android PDF link annotation
    • http://inruho.ru/ckfinder/userfiles/files/45135670653.pdfIn PDF document text
    • http://baheth24cars.com/ckfinder/userfiles/files/wodazi.pdfIn PDF document text
    • https://eventaipei.com/upload/files/67660684528.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/09/08/file/56469951003.pdfIn PDF document text
    • https://5of7edwardstreet.com/assets/media/files/dodekefujidozawasugab.pdfIn PDF document text
    • https://mobilpetrol.olajpark.hu/files/files/97268510457.pdfIn PDF document text
    • https://senesi-sklad.cz/userfiles/file/54007193466.pdfIn PDF document text
    • http://avstralianature.ru/ckfinder/userfiles/files/54480293362.pdfIn PDF document text
    • http://www.ishvani.com/www/js/ckfinder/userfiles/files/23810020110.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/49920592030.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d37053dc7b---zezubolugij.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/6eq8vh32aitdq1akplk5g4b9kv/figotolo.pdfIn PDF document text
    • http://longbeach.ilovepokebar.com/uploads/files/30056698019.pdfIn PDF document text
    • http://finemetal-cn.com/upload/files/tofibisuxubap.pdfIn PDF document text
    • https://cargotavio.ru/files/file/jagozilu.pdfIn PDF document text
    • http://delfosventures.net/userfiles/files/xabujagewaze.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/12487188770.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161428c11e3563---57766165436.pdfIn PDF document text
    • http://eko-uklid.com/files/file/12751662102.pdfIn PDF document text
    • https://bostaninsaat.com/image/files/36223584641.pdfIn PDF document text
    • http://gazdalkodjokosan.hu/img/userfiles/file/14906505874.pdfIn PDF document text
    • https://lostfoundglobal.com/userfiles/file/lebexutizeledilufutimomit.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB053 10816 bytes
SHA-256: ac794aa418e830a03e1eeeedde25ce49d3cac5579bf01557fa852c54dc6e1c40
font_01_sfnt_off0000c918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC918 14948 bytes
SHA-256: 1a1392d976b26c4578142813d6279c3bd2b7c9e3ad3a803aa8e12a0a44f0af67
font_02_sfnt_off0000ef11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1